Cited by 567RNA Research and SplicingEpigenetics and DNA MethylationGenomics and Chromatin Dynamics

Intragenic DNA methylation modulates alternative splicing by recruiting MeCP2 to promote exon recognition

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Maunakea, Alika K, Chepelev, Iouri, Cui, Kairong, Zhao, Keji·2013·Cell Research

Abstract

Although the function of DNA methylation in gene promoter regions is well established in transcriptional repression, the function of the evolutionarily conserved widespread distribution of DNA methylation in gene body regions remains incompletely understood. Here, we show that DNA methylation is enriched in included alternatively spliced exons (ASEs), and that inhibition of DNA methylation results in aberrant splicing of ASEs. The methyl-CpG-binding protein MeCP2 is enriched in included ASEs, particularly those that are also highly methylated, and inhibition of DNA methylation disrupts specific targeting of MeCP2 to exons. Interestingly, ablation of MeCP2 results in increased histone acetylation and aberrant ASE-skipping events. We further show that inhibition of histone deacetylase (HDAC) activity leads to exon skipping that shows a highly significant degree of overlap with that caused by MeCP2 knockdown. Together, our data indicate that intragenic DNA methylation operates in exon definition to modulate alternative RNA splicing and can enhance exon recognition via recruitment of the multifunctional protein MeCP2, which thereby maintains local histone hypoacetylation through the subsequent recruitment of HDACs.

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  • Hypomethylation of repetitive elements in cancer cells can lead to activation and transposition of endogenous retroviral sequences, promoting genetic instability and tumour development.

    “Nevertheless, hypomethylation of these elements is observed in cancer cells 26,27 and this can lead to activation and transposition of the endogenous retroviral sequences thereby promoting genetic instability and tumour development 1 (Figure 2).”
  • MeCP2 plays a part in regulating exon splicing.

    “Similarly, the mCpG-binding protein MeCP2 was found to play a part in regulating exon splicing113.”
  • High methylation leads MeCP2 to bind alternatively spliced exons, resulting in exon inclusion.

    “In this case, a high methylation level led to MeCP2 binding to alternatively spliced exons, which resulted in exon inclusion (FIG. 4).”

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Authors
Maunakea, A. K., Chepelev, I., Cui, K., & Zhao, K.
Affiliations
  • University of Hawaiʻi at Mānoa (US)
  • Cincinnati Children's Hospital Medical Center (US)
  • National Institutes of Health (US)
Corresponding author
Zhao, Keji
Venue
Cell Research
Published
2013-08-13
Volume
23
Issue
11
Pages
1256-1269
ISSN
  • 1001-0602 (ISSN-L)
  • 1748-7838
OpenAlex
W2074898309
Cited by
552
References
46
Citations by year
2026: 17 · 2025: 19 · 2024: 26 · 2023: 32 · 2022: 32 · 2021: 55 · 2020: 47 · 2019: 57 · 2018: 42 · 2017: 57 · 2016: 59 · 2015: 53 · 2014: 48 · 2013: 6
FWCI
24.77
Type
journal article
Language
en
Open access
Locations
  • Cell Research (publishedVersion, cc-by-nc-nd)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by-nc-nd)
  • PubMed Central (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
Funders
  • Johns Hopkins University (HCT116)
  • National Institutes of Health
  • University of California, San Francisco
  • National Heart, Lung, and Blood Institute
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA Research and Splicing
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Epigenetics and DNA Methylation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
Keywords
alternative splicing, MeCP2, exon skipping, exon recognition, histone acetylation, histone deacetylase, gene body methylation, methyl-CpG binding proteins, RNA splicing regulation
MeSH terms
Cell Line, Exons, Humans, Alternative Splicing, DNA Methylation, HCT116 Cells, Methyl-CpG-Binding Protein 2

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